Hammer

Patent metadata

Field	Value
Publication number	US-11358263-B2
Application number	US-201916280487-A
Country	US
Kind code	B2
Filing date	Feb 20, 2019
Priority date	Feb 21, 2018
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

A hammer is provided that includes a handle, a head, a striking insert, and a claw. The hammer provides for a head with a keyed hole to couple to a keyed projection on a striking insert. The head also includes a dovetail projection that couples to the dovetail connection of the claw. Each component may comprise a different material. For example, the striking insert and the claw comprise one material, and the handle and the head comprise another material. In some embodiments, a slotted punch with a magnetic retainer creates a bore through the face of the head and the striking insert to support a fastener (e.g., a nail) within the head.

First claim

What is claimed is:

1. A hammer comprising:
a handle defining a longitudinal axis extending lengthwise through the handle, the handle comprising a mounting portion on a first end and a grip portion on a side surface of the handle;
a head coupled to the mounting portion of the handle and extending in a direction transverse to the longitudinal axis, the head comprising a first material and a keyed hole in a face of the head, and a dovetail projection opposite the keyed hole;
a striking insert comprising a second material, a striking surface, an inner surface opposite the striking surface, and a keyed projection extending from the inner surface toward the striking surface, wherein the keyed projection is coupled to the keyed hole in the face of the head, an end of the keyed projection—wherein the striking insert further comprises a recess formed in the keyed projection and extending from the inner surface towards the striking surface; and
a claw slidably engaged with the dovetail projection of the head via a dovetail connection, the dovetail projection extending along the head in a direction parallel to the longitudinal axis of the handle;
wherein the first material is different than the second material; and
wherein the dovetail projection defines a width that varies as the dovetail projection extends from the claw towards the striking insert, and wherein the width of the dovetail projection gradually tapers as the dovetail projection extends towards the striking insert.

2. The hammer of claim 1 , wherein the striking insert comprises steel with a Rockwell Scale Hardness between 30 HRC to 70 HRC, and the keyed projection of the striking insert is coupled to the keyed hole in the head with a press-fit connection.

3. The hammer of claim 1 , further comprising a lateral pin that passes through the head and the striking insert, wherein the keyed projection is coupled to the keyed hole with an interference fit.

4. The hammer of claim 1 , wherein the striking insert and the claw both comprise the second material.

5. The hammer of claim 1 , wherein the second material is a forged steel alloy carbide material.

6. The hammer of claim 1 , wherein the keyed projection of the striking insert is hollow, and the striking surface of the striking insert is a milled repeating pattern of raised projections separated by depressions formed along the striking surface.

7. The hammer of claim 1 , wherein an outer diameter of the striking insert is equal to a diameter of the face of the head, wherein the outer diameter is between 1.25 in. and 1.75 in., and wherein the striking insert has a thickness in the transverse direction between 0.3 in. and 0.5 in., and wherein a length of the keyed projection of the striking insert is between 0.6 in. and 0.9 in. in the transverse direction.

8. The hammer of claim 1 , further comprising a slotted punch comprising a bore extending through the face and the striking insert and extending partially through the head in the direction transverse to the longitudinal axis, the slotted punch further comprising a punch surface in the head where the bore terminates.

9. The hammer of claim 8 , wherein the slotted punch is tear shaped and includes a magnetic retainer.

10. The hammer of claim 1 , wherein the handle and the head both comprise the first material and form a continuous, integral piece of the first material.

11. The hammer of claim 10 , wherein the first material is a titanium alloy, and the second material is a steel alloy.

12. The hammer of claim 1 , wherein the recess in the keyed projection of the striking insert terminates within the striking insert such that the recess consists of only a single opening in the keyed projection.

13. A hammer comprising:
a handle defining a longitudinal axis extending lengthwise through the handle, the handle comprising a mounting portion on a first end and a grip portion on a side surface of the handle;
a head comprising a first material, a striking portion, and a dovetail projection opposite the striking portion along a transverse axis and extending along the head in a direction parallel to the longitudinal axis of the handle, the head coupled to the mounting portion of the handle and extending along the transverse axis perpendicular to the longitudinal axis; and
a claw comprising a second material and slidably coupled to the head via a dovetail connection, the dovetail connection extending along the head in a direction parallel to the longitudinal axis of the handle;
wherein the first material and the second material are different materials;
wherein the dovetail projection defines a width that varies as the dovetail projection extends from the claw towards the striking portion, and wherein the width of the dovetail projection gradually tapers as the dovetail projection extends towards the striking portion.

14. The hammer of claim 13 , further comprising a striking insert coupled to the striking portion of the head, a striking surface of the striking insert is a milled repeating pattern of raised projections separated by depressions formed along the striking surface, the striking insert and the claw comprising the second material.

15. The hammer of claim 13 , wherein the claw comprises steel with a Rockwell Scale Hardness between 30 HRC to 70 HRC, and the dovetail connection of the claw is coupled to the dovetail projection of the head with a press-fit connection.

16. The hammer of claim 13 , further comprising a lateral pin that passes through the head and the claw, wherein the dovetail connection of the claw is coupled to the dovetail projection of the head with an interference fit, and wherein the handle and the head both comprise the first material and are formed from a continuous, integral piece of the first material.

17. The hammer of claim 13 , wherein the first material is a titanium or aluminum alloy; the second material is a steel alloy, and wherein the handle comprises composite fiber.

18. The hammer of claim 13 , wherein a length of the dovetail projection along the transverse axis is between 0.2 in. and 0.4 in. and a width of the dovetail projection in a direction perpendicular to the transverse axis is between 0.3 in. and 0.6 in., and wherein the dovetail projection tapers from a top side of the head to a bottom side of the head.

19. The hammer of claim 13 , wherein the head has a top side, a bottom side, and an opening extending from the top side to the bottom side defining a tapered inner wall inside the head, the tapered inner wall receiving the mounting portion of the handle, the head including a resin to fill a volume between the mounting portion and the tapered inner wall, wherein a circumference of the tapered inner wall at the top side of the head is greater than the circumference of the tapered inner wall at the bottom side of the head.

20. The hammer of claim 19 , further comprising ribbed projections extending from the mounting portion of the handle and wherein the ribbed projections are equally spaced from the tapered inner wall along the transverse axis of the head.

21. A hammer comprising:
a handle comprising a first material and defining a longitudinal axis extending lengthwise through the handle, the handle comprising a mounting portion on a first end and a grip portion on a side surface of the handle adjacent to a second end opposite the first end;
a head coupled to the mounting portion of the handle and extending along a transverse axis orthogonal to the longitudinal axis, the head comprising a second material, the head

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Paulsen Alexander J
• Cemke Jr James A

Classifications

• B25D1/06 Primary

  Magnetic holders · CPC title

• B25D1/12

  having shock-absorbing means · CPC title

• B26B23/00

  Axes; Hatchets {(attaching of the handles B25G)} · CPC title

• B25D2222/42

  Steel · CPC title

• B25D1/02 Primary

  Inserts or attachments forming the striking part of hammer heads (B25D1/08 - B25D1/14 take precedence) · CPC title